Entity Framework select on IQueryable throwing "must be reducible node"

I have this query where predicate is Expression<Func<Property, bool>> and the whole query returns an IQueryable:

var query = _db.PropertyRepository.Get(predicate)
               .Include(x => x.Info)
               .ThenInclude(x => x.Address)
               .Include(x => x.TransactionListingAgents)
               .ThenInclude(x => x.Agent)
               .ThenInclude(x => x.Person)
               .ThenInclude(x => x.Contact)

I'd like to perform a select on that IQueryable to project to a DTO, because I need to do some data manipulation with that data. So I have this other query

query.Select(x => new BasePropertyDTO() {
    Id = x.Id,
    StreetNumber = x.Info.Address.StreetNumber,
    Street = x.Info.Address.StreetName,
});

However, it throws an exception

must be reducible node

My workaround was doing ToList() before the Select() and that doesn't throw the exception anymore , but now I'm grabbing data that I don't need.

I have found out that the issue comes when I try to project on my select properties from Info navigation property or any navigation property, even though I have the Include() calls.

Any ideas on why this is behaving this way or what's wrong with my queries?

Complete query after upgrading to 1.1.0:

query.ToList().Select(x => new BasePropertyDTO() {
                Id = x.Id,
                StreetNumber = (x.Info != null && x.Info.Address != null) ? x.Info.Address.StreetNumber : "",
                Street = (x.Info != null && x.Info.Address != null) ? x.Info.Address.StreetName : "",
                City = (x.Info != null && x.Info.Address != null) ? x.Info.Address.City : "",
                AgentName = x.TransactionListingAgents.Where(t => t.Agent != null && t.Agent.Person != null && t.Agent.Person.Contact != null && t.ListingId == x.Id && t.BrokerageId == x.BrokerageId).Select(a => a.Agent.Person.Contact.FullName).FirstOrDefault()
            });

The AgentName part throws

An item with the same key has already been added

If I remove that, I still get the

must be reducible node